sanei/sanei__ir_8h_source.html

#ifndef SANEI_IR_H

#define SANEI_IR_H


#include <stdint.h>


#define SAMPLE_SIZE     40000

#define HISTOGRAM_SHIFT 8

#define HISTOGRAM_SIZE  (1 << HISTOGRAM_SHIFT)


#define SAFE_LOG(x) ( ((x) > 0.0) ? log ((x)) : (0.0) )

#define MAD_WIN2_SIZE(x) ( (((x) * 4) / 3) | 1 )

typedef uint16_t SANE_Uint;


typedef union

{

  uint8_t *b8;

  uint16_t *b16;

}

SANEI_IR_bufptr;


extern void sanei_ir_init (void);


extern SANE_Status

sanei_ir_create_norm_histogram (const SANE_Parameters * params,

                           const SANE_Uint *img_data,

                           double ** histogram);


extern SANE_Status

sanei_ir_threshold_yen (const SANE_Parameters * params,

                         double * norm_histo, int *thresh);


extern SANE_Status

sanei_ir_threshold_otsu (const SANE_Parameters * params,

                          double * norm_histo, int *thresh);


extern SANE_Status

sanei_ir_threshold_maxentropy (const SANE_Parameters * params,

                               double * norm_histo, int *thresh);


SANE_Status

sanei_ir_RGB_luminance (SANE_Parameters * params, const SANE_Uint **in_img,

                       SANE_Uint **out_img);


extern SANE_Status

sanei_ir_to_8bit (SANE_Parameters * params, const SANE_Uint *in_img,

                 SANE_Parameters * out_params, SANE_Uint **out_img);


SANE_Status sanei_ir_ln_table (int len, double **lut_ln);


extern SANE_Status

sanei_ir_spectral_clean (const SANE_Parameters * params, double *lut_ln,

                        const SANE_Uint *red_data,

                        SANE_Uint *ir_data);


extern SANE_Status

sanei_ir_filter_mean (const SANE_Parameters * params,

                      const SANE_Uint *in_img, SANE_Uint *out_img,

                      int win_rows, int win_cols);


extern SANE_Status

sanei_ir_filter_madmean (const SANE_Parameters * params,

                         const SANE_Uint *in_img,

                         SANE_Uint ** out_img, int win_size,

                         int a_val, int b_val);


void

sanei_ir_add_threshold (const SANE_Parameters * params,

                        const SANE_Uint *in_img,

                        SANE_Uint * mask_img, int threshold);


void

sanei_ir_manhattan_dist (const SANE_Parameters * params,

                        const SANE_Uint * mask_img, unsigned int *dist_map,

                        unsigned int *idx_map, unsigned int erode);


void

sanei_ir_dilate (const SANE_Parameters * params, SANE_Uint * mask_img,

                unsigned int *dist_map, unsigned int *idx_map, int by);


void

sanei_ir_find_crop (const SANE_Parameters * params,

                    unsigned int * dist_map, int inner, int * edges);


SANE_Status

sanei_ir_dilate_mean (const SANE_Parameters * params,

                      SANE_Uint **in_img,

                      SANE_Uint *mask_img,

                      int dist_max, int expand, int win_size,

                      SANE_Bool smooth, int inner,

                      int *crop);


#endif /* not SANEI_IR_H */

sanei_ir_create_norm_histogram
SANE_Status sanei_ir_create_norm_histogram(const SANE_Parameters *params, const SANE_Uint *img_data, double **histogram)
Create the normalized histogram of a grayscale image.

sanei_ir_add_threshold
void sanei_ir_add_threshold(const SANE_Parameters *params, const SANE_Uint *in_img, SANE_Uint *mask_img, int threshold)
Add dark pixels to mask from static threshold.

sanei_ir_threshold_maxentropy
SANE_Status sanei_ir_threshold_maxentropy(const SANE_Parameters *params, double *norm_histo, int *thresh)
Implements a Maximum Entropy thresholding method.

sanei_ir_dilate
void sanei_ir_dilate(const SANE_Parameters *params, SANE_Uint *mask_img, unsigned int *dist_map, unsigned int *idx_map, int by)
Dilate or erode a mask image.

sanei_ir_filter_mean
SANE_Status sanei_ir_filter_mean(const SANE_Parameters *params, const SANE_Uint *in_img, SANE_Uint *out_img, int win_rows, int win_cols)
Optimized mean filter.

sanei_ir_manhattan_dist
void sanei_ir_manhattan_dist(const SANE_Parameters *params, const SANE_Uint *mask_img, unsigned int *dist_map, unsigned int *idx_map, unsigned int erode)
Calculates minimal Manhattan distances for an image mask.

sanei_ir_threshold_otsu
SANE_Status sanei_ir_threshold_otsu(const SANE_Parameters *params, double *norm_histo, int *thresh)
Implements Otsu's thresholding method.

sanei_ir_RGB_luminance
SANE_Status sanei_ir_RGB_luminance(SANE_Parameters *params, const SANE_Uint **in_img, SANE_Uint **out_img)
Generate gray scale luminance image from separate R, G, B images.

sanei_ir_to_8bit
SANE_Status sanei_ir_to_8bit(SANE_Parameters *params, const SANE_Uint *in_img, SANE_Parameters *out_params, SANE_Uint **out_img)
Convert image from >8 bit depth to an 8 bit image.

sanei_ir_find_crop
void sanei_ir_find_crop(const SANE_Parameters *params, unsigned int *dist_map, int inner, int *edges)
Suggest cropping for dark margins of positive film.

sanei_ir_spectral_clean
SANE_Status sanei_ir_spectral_clean(const SANE_Parameters *params, double *lut_ln, const SANE_Uint *red_data, SANE_Uint *ir_data)
Reduces red spectral overlap from an infrared image plane.

sanei_ir_dilate_mean
SANE_Status sanei_ir_dilate_mean(const SANE_Parameters *params, SANE_Uint **in_img, SANE_Uint *mask_img, int dist_max, int expand, int win_size, SANE_Bool smooth, int inner, int *crop)
Dilate clean image parts into dirty ones and smooth int inner,.

sanei_ir_init
void sanei_ir_init(void)
Initialize sanei_ir.

sanei_ir_threshold_yen
SANE_Status sanei_ir_threshold_yen(const SANE_Parameters *params, double *norm_histo, int *thresh)
Implements Yen's thresholding method.

sanei_ir_ln_table
SANE_Status sanei_ir_ln_table(int len, double **lut_ln)
Allocate and initialize logarithmic lookup table.

sanei_ir_filter_madmean
SANE_Status sanei_ir_filter_madmean(const SANE_Parameters *params, const SANE_Uint *in_img, SANE_Uint **out_img, int win_size, int a_val, int b_val)
Find noise by adaptive thresholding.

SANEI_IR_bufptr
Pointer to access values of different bit depths.
Definition: sanei_ir.h:41

SANEI_IR_bufptr::b16
uint16_t * b16
‍8, <= 16 bits
Definition: sanei_ir.h:43

SANEI_IR_bufptr::b8
uint8_t * b8
<= 8 bits
Definition: sanei_ir.h:42